2x^2+5x-7.5=0

Simple and best practice solution for 2x^2+5x-7.5=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 2x^2+5x-7.5=0 equation: 



2x^2+5x-7.5=0

a = 2; b = 5; c = -7.5;
Δ = b2-4ac
Δ = 52-4·2·(-7.5)
Δ = 85
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-\sqrt{85}}{2*2}=\frac{-5-\sqrt{85}}{4}
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{85}}{2*2}=\frac{-5+\sqrt{85}}{4}
$

See similar equations:

| 2−2b=4 | | -10+8x+3-5=14 | | 10=z+19/4 | | (-5(5+2x))-6=-81 | | 3=y3− 5 | | 5=15−2s | | 2x^2-9x+19=15 | | 5(-8-2x)=30 | | 11+-t=19 | | 25+305+4x+11x=360 | | 48=6(b-91) | | 2x^2-x-3=(-2) | | 3y+11=-2 | | 4a+3a=~21 | | 107+107+x+x=360 | | 20=2v−-4 | | g2+ -7=-6 | | 2y-3=4y+6.y= | | 2x^2-9x+8=13 | | -28+10s=72s= | | 175+125+3x+17x=360 | | 3c−1=2 | | x+2/4=25 | | 3x+17+17x+3=180 | | x^2-2x-18=(-15) | | x2-2x-18=(-15) | | 2x+0.5=10.5 | | 291+55+2x+5x=360 | | 5h-13=17 | | 15+15+x+x=360 | | x÷4=25 | | 4p+2=4p |

Equations solver categories